首页
登录
职称英语
Today in mind-bendingly cool stuff that nanoparticles(纳米粒子)can do: A team of
Today in mind-bendingly cool stuff that nanoparticles(纳米粒子)can do: A team of
游客
2024-09-23
42
管理
问题
Today in mind-bendingly cool stuff that nanoparticles(纳米粒子)can do: A team of researchers at Rice University in Texas has demonstrated a mechanism by which they can create steam in just seconds by focusing sunlight on a mixture of water and nanoparticles. This isn’t just some artificial means of lowering boiling point either: this solar powered "boiler" can produce steam before the water even gets warm to the touch, without ever bringing the aggregate water to a boil.
Right now this research is very much still in the lab, and the researchers aren’t sure exactly how far they can push it. But it doesn’t take much to imagine the possibilities for a steam generator that runs solely on water and sunlight.
The technology works by mixing a small amount of either carbon or gold-coated silicon dioxide(二氧化硅)nanoparticles, each just one-tenth the diameter of a single human hair, with water in a glass vessel. Their small diameters—smaller than the wavelength of visible light—means that they can absorb most of a light wave’s energy rather than scattering it. So when sunlight is focused on the vessel with a lens, the particles quickly become quite hot—hot enough to vaporize(蒸发)the water directly surrounding it.
This creates a bubble of steam that envelopes the nanoparticle, which is now insulated from the cooler liquid water by the steam, which allows it to grow hotter still, vaporizing more of the water immediately around it. At some point the nanoparticle and its steam envelope become large enough to grow buoyant, at which point the whole steam bubble— particle and all—floats to the surface. The steam is released into the air, the particle falls back into the cooler water and sinks back down until it begins to absorb sunlight and heat again, at which point the process starts all over.
Multiply that by the number of nanoparticles in the mixture, and you have something of a simulated boil, but one that doesn’t require the entire pot of water to reach boiling point before the first steam bubbles head to the surface. You can think of it as a way of micromanaging the boiling process, specifically heating some parts of the water(where it touches the nanoparticles)while leaving the rest of the water cool. And the particles themselves are completely durable—they keep absorbing, heating, cooling, and absorbing again, with no need to replace them.
Pretty nuts, no? It spells an interesting future for solar power in general, but more specifically it’s easy to see how a cheap and abundant source of steam, even in low specific volumes, could be used to do anything from generate electricity and heat to lower the energy intensive nature of certain processes like water desalinization(脱盐). As the WaPo points out, the last time someone came up with a cheap and easy way to generate and harness abundant steam it completely changed the world. So there’s that. [br] We can infer from the passage that______.
选项
A、when put into water, nanaoparticles are highly active and hot enough to vaporize it
B、the steam bubble with some nanoparticles in it would float to the surface with steam released
C、once the nanoparticles are used up, new ones should be put into the water again
D、efficient use of steam may reduce the energy cost in some industrial processes
答案
D
解析
推断题。根据最后一段,使用纳米粒子降低了产生蒸汽的成本,操作起来高效便捷,这在诸如发电、产生热量、降低脱盐等过程的能源密集型性质上具有重要意义,[D]“蒸汽的高效利用可能会降低某些工业过程中的能源消耗。”表述正确,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3771076.html
相关试题推荐
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
PASSAGEFOUREntire语义题。根据第一段最后一句,这种通过太阳光和纳米粒子产生蒸汽的方法不再像以前那样必须将整壶水煮沸即可产生蒸汽;文章第五段第一
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
PASSAGEFOUREntire语义题。根据第一段最后一句,这种通过太阳光和纳米粒子产生蒸汽的方法不再像以前那样必须将整壶水煮沸即可产生蒸汽;文章第五段第一
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
随机试题
Accordingtothepassage,anorganismwithouthardbodyparts[br]Whatisthe
【B1】[br]【B2】A、notionsB、noticeC、noteD、conceptA近义词比较。notionn.概念,观念,主张,打算,想法
2006-2011年,人均用电量年均增长:() A.218千瓦时 B.2
笛卡儿“普遍怀疑”的方法是…种非理性主义的方法。()
劳动争议发生后,一方当事人提出协商要求后,另一方当事人应当积极作出口头或者书面回
心理咨询师在本案例中应该注意的问题包括( )。A.关注求助者的隐私内容 B.
以下哪种情况不宜做金属烤瓷全冠修复A.牙体缺损较大而无法充填治疗者 B.氟牙症
某水利工程,发包人与承包人按照《水利水电工程标准施工招标文件(2009年版)》签
A.轻微病变性肾小球肾炎 B.弥漫性系膜增生性肾小球肾炎 C.弥漫性新月体性
男性,50岁,饮酒后上腹痛、腹胀8小时。查体:血压130/80mmHg,呼吸1
最新回复
(
0
)